Steam-boiler construction.



J. A. WOLMER. STEAM BOILER CONSTRUCTION. APPLICATION FILED DBO. 24. 1913.

1,106,066. Patented Aug. 4, 1914 Z SHEETS-SHEET 1.

W l TNESSES: IN V EN TOR:

A TTORNE Y.

J. A. WOLMER. STEAM BOILER CONSTRUCTION.

APPLICATION FILED DBO. 24, 1913.

1,106,066. Patented Aug. 4, 1914.

2 SHEETS-SHEET Z.

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' bars or with radialv staybolts, and which UNITED "STATES PATENT; OFFICE.

JOHN,AV. WOLMER, OF INDIANAPOLIS, INDIAVNA.

S'IEAIlllll-BOILEI'Ly CONSTRUCTION.

Speciicationrof Letters Patent.

Patented Aug. 4, xvii.

Application nien December 24, 1913. serial' No. 808,598.

To all whom t may concern.

Be it known that JOHN'A. WoLMnn, a citizen ofthe United States, residing `at Indianapolis, in the county of Marion and State of Indiana, have invented a new and useful Steam-Boiler Construction, of which the following is a specification, reference being had to the accompanying drawihgs, and to the letters and figures of `reference marked thereon.

This .invention relates to boilers in which water maybe heated, more particularly to steam generating boilers of'the locomotive type, the invention having reference moreL particularly toimproved boiler construction with special reference to the crown sheet of fire-boxes. y

An object of the invention is to provide an improved boiler construction relating, particularly to the crown sheets thereof to the end thatl the maximum degree of safety shall be attained when operating under a high steam pressure7 and with a view to economy in constructlon and maintenance. Y Another object of the invention is to provide an improved crown sheet construction which shall permit the makin of repairs in case of necessity without it eing necessary in all cases to `discard large sheets of metal when only a. relatively small portion may be defective or damage A further object of the invention is to provide an improved sectional crown sheet of such construction as to be adapted to bej appliedl to boilers now in use Ahaving plirin' crown sheets provided either with crown improved crown sheet shall be adapted to present a relatively large amount of surface` to the fire-box heat so as to lbe highly efiicient yand economicalv in heating water or generating steam. Y

With the above mentioned and other objects in- View, the invention consists in a sectional crown sheet of novel construction in whichthe sectionsl thereof are formed and arrangedin al novell manner, the sections being so` oonstrueted and arranged as to` permit of the removal and replacement of any one of the sections.

The invention consists. further/linl the novel parts and in the combinations and arrangements of parts as hereinafter particularlydescribed and further defined 1n the accompanying claims.

a transverse Referring to the drawings, Figure lis a central longitudinal section o a locomotive boiler -fire-box constructed.substantially in accordance with the invention; Fig. 2,- a fragmentary horizontal section ap roximately on the line A A in Fig. l; Iig. 3, section approximately on the l1ne B B in Fig. Il; Fig. 4, an end Viewv of one of the crown sheet sections; Fig, 5 a

fragmentary section approximately on the line C C in Fig. l; Fig. 6, a fragfmentary,l

View of a bar preferablyl used parts are slightly mo ied, and Fig. 11 is a transverse section cfa square type of firebox constructed in accordance with the invention.

Similar reference characters in the different figures of the drawings indicate corresponding elements or features of construction herein referred to. f

For the purpose of clearlyvillustrating and describlng the invention well. known features of boiler-'construction are briefly referred to and, as will be understood, may.

b'evariously modified as to details, a popular ty e o boiler construction comprising a mu -ring 1, a boiler head 2, outer side sheets 3 and 4-and an arched top portion 5 connected lto the side sheets integrally or otherwise a throat sheet 6.and a boiler shell 7 comprising 'the outer portions, the inner portions comprisin a fire-door sheet 8, side vsheets 9 and 10, t ere being a door frame 11, and a flue-sheet 12 to which draft flues 13 are connected, stay bolts 14, 15, l5', 16. being approprately used as is customary. The sheet 8 has 'a fiange 17' extending inward or away from the outer sheet 2, the flue sheet 12 having a flange 18 extending inward vor towardy the flange 17.Y A front `Hue-sheet 19, as will be understood, is connected to the sheet 12. v l

It will be understood that in some cases a crown sheet is made continuo-11s with the side sheets of the fire-box which necessitates shell opposite to the iue a large amount of troublesome work in making repairs in case of accidental injury to the crown sheet, in other cases although the crown sheet ma be composed of a separate sheet yof metal t e whole sheet usually must be discarded in case of damage to only a small portion thereof.l Also in some cases crown bars when employed prevent free cir-y culation of water so that mud or scale rapidly aceumulates upon the crown sheet to the detriment thereof; and when radial stays are secured directly to the crown sheet, as is Y ably pressed or otherwise shaped so that the main portion 2O or 20 of the section is curved so as to be trough-like in normal position, the end portions 21 and 22 being suitably shaped so as to contorni to the flanges 17 and 18 respectively upon which the end portions are supported, the end portions having rivet holes 23 and 24 therein respectively to receive rivets 25 and 26 whereby the end portions are secured to the flanges respec tively. 'When the flanges 17 and 18 are arched it will be understood that the end portions 21 and 22 are arched. Each scction has upturned flanges 27 and 28 formed thereon in which are rivet holes 29 and 30 respectively to receive securing rivets, the flanges of the adjacent sections being connected together so that they serve as crown bars or braces, and preferably separate bars 31, 31', are placed between the flanges of the adjacent sections to atl'ord additional strength and also to be used in calking the seams in preventing leaks, each bar 31 corresponding in length to the length of the section and having downward offset bearing portions 32 and 38 on the under side of opposite end portions thereof adapted to rest upon the flanges 17 and 18 respectively, and on which a calking tool may be used. Each bar has `a horizontal row ot rivet holes 34 whichreceive rivets 35, 35', whereby the bar is secured between the two adjacent flanges ofthe adjacent sections, the bar extendingr upward above the flanges and the upper portion having a row ofholes 36 therein that receive connecting bolts or pins-37,. 37",

'whereby stay plates 38 are secured to the bars, the plates being connected also to angle plates 39 that are secured tothe top portion 5, the plates being connected by means of bolts of pins 40 to the angle lates.- The stay plates in some cases are pre erable since they tend to prevent surging of the water on the crown sheet. In some cases, however; iu rase radial stay bolts have been removed from the to portion 5, studs 41 may be inserted in'to t e stay bolt holes, the studs having eyes 42 therein, and stay bars 43 having jaws 44 and 45 on opposite ends thereon may be connected res ec'tively to the bars 31 and the eyes 42, or i desired two bars 46 and 47 obviously may be connected to the eyes as shown in' Fig. 10. In some cases the upper portions or tops of the side sheets 9 and 10 are provided with flanges 48 and 49 respecl tively that extend into the water space or toward the outer portions 3 and 4 respectiwly, the bars 3l, 31', being secured between the anges and the flanges of adjacent sections of the crown sheet.

In case the at top or square lire-box is preferred the crown sheet is generally formed so that the ends of the sections correpond to a flat plane, instead of conforming to an arch as hereinbefore described. Such fire-box comprises side sheets 9 and 10' and the marginal crown sheet sections are provided with -downturned flanges 50 and 51 adapted to be secured to the up er portions Iof the side sheets by means of rivets 52, 53, the upper end 54 of the fire-door sheet 8 being straight.L In' some cases, the main portion of the crown sheet section may be shaped so as to form an arch 55 instead of a trough or invertedarch, as seen in Figfl; The outer portions 56 and 57 may be formed as usual as may also the top portion 58 which may be flat, the boiler head 59 being shaped correspondingly. The edges of the flanges 17 and 18 may be callked as usual and the calking tool may he used on the under side of the bars 31 so as to prevent leaks, and also the tool may be used against the ends of the bars.

In practical use the steam pressure is resisted not only by the sections of the crown sheet but by the bars 31 and also by the stays connected to the bars, so that the crown sheet is capable of withstanding excessive pressure. The sediment from the water gravitates and flows longitudinally from the section and may readily be washed therefrom. In case of accidental or unavoidable damage to one or more sections of the crown sheet, it is apparent that replacement may be made without sacrificing other sections.

Having thus described the invention. what 1. A` boiler crown sheet's'ection including an oblong strip havingv straight flanges on its longer edge portions, the main portion of the strip between the flanges being curved transversely, the strip having end portions between the flanges that do not conform to the curvature of the main portion, being adapted to conform to the tops of lire-door sheets and flue sheets. i

2. In boiler construction, the combination of a plurality of sections, each section being composed of an oblong strip' having straight flanges on its longer edge portions, the strip being curved transversely between the flanges froma point distant from one end to a point'distant from the opposite end of the strip, the end portions of the strip beyond said curved portion havingrivet-holes therein whereby to secure the two end portions respectively to a fire-door sheet and a flue-sheet of a fire-box, and bars secured` each between the` flanges of two adjacent strips,

f the end portions of the bars being adapted to be supported respectively on the tire-door,

sheet and the flue-sheet.

3. In a boiler, the combination with two uprightly arranged side sheets, an uprightly arranged redoor sheet, and an uprightly arranged flue-sheet, of a crown sheet comprisingk a plurality of separate sections connected together and collectively extending romone to the other of the side sheets, each 'j of the sections being secured at one end to the fireldoor sheet and at its opposite end tothe flue-sheet, a marginal one of the sections being secured to one of the side sheets, the opposite vmarginal one of 'the sections be ing secured to the remaining oneof the side sheets.

4. In a boiler the combination of two side sheets having each a flange, -two bars arranged upon the two anges respectively,

two end sheets having each a flange connected to thejside sheets, two crown sheet sectionseach having flanges, one vflange of the two sections being arranged respectively on the two bars, the sections being secured at opposite ends to the anges of the two end 's meets respectively, rivets securing vthe bars to-the anges adjacent thereto, and a plurality of crown sheet sections secured at opposite ends to the flanges of the two end sheets respectively between the two crown sheet sections, eachof the plurality of sections havng two straight flanges thereon, the anges of adjacentA sections-being ad- V`jacently arranged, bars between the adjacent fianges and secured thereto, and a plurality of stays secured to each of said bars.

5. In boiler construction, a crown sheet comprising a pluralityfiof se arate sections, each section bein compose of an oblong strip having straight flanges onv its longer edge portions, the strip belng curved transversely between the flanges, a plurality of bars secured each between the flanges of two adjacent strips and having offset bearing portions at opposite ends thereof, the bars extending beyond the flanges and having each a plurality of holes therein provided with staying devices, and stays removably' 'connected to said devices.

JOHN A. WOLMER. Witnesses E. T. SILvIos, GUY S. THOMSON.

Copies ot this patent may be obtained for ive cents each, by addressing the Commissioner of Patents, Washington, D. C.

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